Police have reopened both eastbound and westbound lanes of the Gardiner Expressway near the Humber River after a fatal overnight motorcycle crash closed a portion of expressway for several hours early Friday morning.

Police shut down eastbound traffic at S. Kingsway and westbound traffic at Lakeshore Blvd. after a motorcyclist in his 30s died early this morning following a series of road mishaps.

The motorcyclist was seen speeding and decelerating unusually while riding eastbound on the expressway, west of the Humber River, just before 1 a.m., police said.

The last time the motorcyclist accelerated beyond the speed limit, police said he lost control and struck the concrete barrier. He was ejected from his motorbike and thrown onto the westbound lanes, where he was struck by several passing cars.

He was pronounced dead at the scene. The Traffic Services reconstruction team is investigating.

It has been a bad several days for motorcycle collisions in the city.

Just a few hours before the fatal crash, another motorcyclist was rushed to a trauma centre following an accident near Church and Richmond Sts.

A spate of traffic accidents across the GTA left four people dead and one critically injured Friday.

At around 3 p.m., a car entering Highway 403 from Winston Churchill Blvd. collided with a truck. There were three people in the vehicle, police said. Two people were killed and the other was rushed to hospital with life threatening injuries.